EP 1036071 A1 20000920 - SYNTHESES OF 5,5'-DIFORMYL-2-2'DIFURAN AND DERIVATIVES THEREOF
Title (en)
SYNTHESES OF 5,5'-DIFORMYL-2-2'DIFURAN AND DERIVATIVES THEREOF
Title (de)
SYNTHESE VON 5,5'-DIFORMYL-2,2'-DIFURAN UND IHRE DERIVATE
Title (fr)
SYNTHESES DU 5,5'-DIFORMYL-2-2' DIFURANE ET DERIVES CORRESPONDANTS
Publication
Application
Priority
- ZA 9900087 W 19990915
- ZA 988414 A 19980915
Abstract (en)
[origin: WO0015623A1] 5,5'-diformyl-2,2'-difuran is prepared in excellent yield by photochemically irradiating furfural or a mixture of furfural and 5-bromo-2-furfural. In the latter case an acid scavenger is present. The solvent is acetonitrile. The process may be carried out continuously, the 5-bromo-2-furfural acting as a catalyst, the furfural being added, and the product being harvested continuously.
IPC 1-7
IPC 8 full level
C07D 307/68 (2006.01); B01J 31/02 (2006.01); B01J 35/02 (2006.01); C07D 307/12 (2006.01); C07D 307/44 (2006.01); C07D 307/48 (2006.01); C07D 307/52 (2006.01); C07D 307/54 (2006.01); C07D 407/04 (2006.01)
CPC (source: EP US)
C07D 307/12 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
WO 0015623 A1 20000323; AT E272060 T1 20040815; AU 6434699 A 20000403; AU 764129 B2 20030814; BR 9906947 A 20011127; CA 2310102 A1 20000323; DE 69918943 D1 20040902; DE 69918943 T2 20050728; EP 1036071 A1 20000920; EP 1036071 B1 20040728; ES 2229777 T3 20050416; JP 2003526607 A 20030909; MX PA00004698 A 20040910; US 6506285 B1 20030114
DOCDB simple family (application)
ZA 9900087 W 19990915; AT 99952044 T 19990915; AU 6434699 A 19990915; BR 9906947 A 19990915; CA 2310102 A 19990915; DE 69918943 T 19990915; EP 99952044 A 19990915; ES 99952044 T 19990915; JP 2000570163 A 19990915; MX PA00004698 A 19990915; US 55443301 A 20010322